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Commit | Line | Data |
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88278ca2 | 1 | /* |
1da177e4 LT |
2 | * mp.c: OpenBoot Prom Multiprocessor support routines. Don't call |
3 | * these on a UP or else you will halt and catch fire. ;) | |
4 | * | |
5 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
6 | */ | |
7 | ||
8 | #include <linux/types.h> | |
9 | #include <linux/kernel.h> | |
10 | #include <linux/sched.h> | |
11 | ||
12 | #include <asm/openprom.h> | |
13 | #include <asm/oplib.h> | |
14 | ||
15 | extern void restore_current(void); | |
16 | ||
17 | /* Start cpu with prom-tree node 'cpunode' using context described | |
18 | * by 'ctable_reg' in context 'ctx' at program counter 'pc'. | |
19 | * | |
20 | * XXX Have to look into what the return values mean. XXX | |
21 | */ | |
22 | int | |
23 | prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc) | |
24 | { | |
25 | int ret; | |
26 | unsigned long flags; | |
27 | ||
28 | spin_lock_irqsave(&prom_lock, flags); | |
29 | switch(prom_vers) { | |
30 | case PROM_V0: | |
31 | case PROM_V2: | |
32 | default: | |
33 | ret = -1; | |
34 | break; | |
35 | case PROM_V3: | |
36 | ret = (*(romvec->v3_cpustart))(cpunode, (int) ctable_reg, ctx, pc); | |
37 | break; | |
6cb79b3f | 38 | } |
1da177e4 LT |
39 | restore_current(); |
40 | spin_unlock_irqrestore(&prom_lock, flags); | |
41 | ||
42 | return ret; | |
43 | } |